I don't think most people know what they're talking about regarding inflaton/deflation. You don't actually need inflation at all. What's exactly is wrong with falling prices?
You want something that somewhat corresponds with growth in the economy (as tech advances, we become more efficient every year).
I've invested in a few coins with a fixed inflationary coin supply after the mining is done: Quark (.5%), Doge (5%) just because I think that both will have uses in addition to Bitcoin which is 0% new coins after mining.